* The optional Envelope Feeder Attachment-D1 is required.** Includes consumables.*** The optional Searchable PDF Kit-C1 is required for Base models.† The Cassette Feeding Unit-AE1 and Cabinet Type-C cannot be installed at the same time.†† Installs on the second paper cassette.††† The Inner Finisher-B1 and Inner 2-Way Tray cannot be installed at the same time.Δ Optional for Base models; standard on "i" models.ΔΔ Requires PCL Printer Kit-AF1.ΔΔΔ Requires Color Send Kit-Y1.〉 Requires the Card Reader Attachment-D3 for installation.〉〉 Serial Interface Kit-J2 and Copy Control Interface Kit-A1 cannot be installed at same time.♦ Card Reader-E1 and Copy Control Interface Kit-A1 cannot be installed at the same time.